The new study tracked thousands of grocery prices across eight of the UK’s biggest supermarkets throughout the year.

Harry Rose, editor of Which? magazine, said: “Our research shows Aldi has retained its crown as the UK’s cheapest supermarket in 2024. “After the added expense of the festive period, many households will be looking to cut costs.

Asda also disagrees with our comparison and says that our small sample of products does not represent the fuller picture of prices and does not account for its deals. The supermarket says that, across the board, its Just Essentials range is the largest and cheapest available, alongside Aldi's.

Which? looks at prices at Aldi, Asda, Lidl, Morrisons, Ocado, Sainsbury’s, Tesco and Waitrose to find the cheapest grocer - and this month, the bill for the winner came to £100.29 on average